Teeth (singular tooth) were bony structures found in the mouths of most species. They aided in chewing food and the speaking of their languages. They were typically cared for by the medical practice of dentistry.

CaptainBenjamin Sisko referred to Klingon teeth as "fangs," and mentioned how he missed them after having his Klingon disguise removed. Odo disagreed, saying that he, for one, wouldn't miss the fangs at all. (DS9: "Apocalypse Rising")